发明名称 |
Mineral mining installation |
摘要 |
A mineral mining installation comprises a longwall conveyor, and a plurality of roof support units positioned side-by-side along the goaf side of the conveyor. The roof support units are positioned to define an access area between the conveyor and the roof support units. A plurality of hydraulic bracing rams act on the conveyor to brace the conveyor longitudinally. Each of the bracing rams is pivotally attached to a floor sill of a respective roof support unit. The hydraulic bracing rams are positioned at the goaf-side edge portion of the access area. The bracing forces are transmitted from the bracing rams to the conveyor via respective transverse arms attached to the bracing rams and to the conveyor.
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申请公布号 |
US4402634(A) |
申请公布日期 |
1983.09.06 |
申请号 |
US19810270505 |
申请日期 |
1981.06.04 |
申请人 |
GEWERKSCHAFT EISENHUTTE WESTFALIA |
发明人 |
MERTEN, GERHARD;SCHLUSENER, HORST;BECKER, KUNIBERT;BEYER, HERBERT |
分类号 |
E21D23/04;E21F13/10;(IPC1-7):E21D15/44 |
主分类号 |
E21D23/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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